Bill Gates shows his sense of humor in a Reddit chat

Every year since 2013, Microsoft cofounder and billionaire philanthropist Bill Gates has held a Reddit AMA (Ask me Anything) session, where anybody on the planet can ask him a question directly.

His sessions garner hundreds of questions across thousands of comments, too many for even him to answer. Gates’ answers are sometimes educational, often insightful, and always interesting.

There’s another constant, too: Every year, Bill Gates posts a new picture or video of himself to the thread as prove that it’s really, actually him taking questions. And the man goes all out, showing the world his very particular sense of humor.

One Reddit user was quick to point out that U.S. cash can be used to buy drugs anonymously, too. But in response, Gates said: “Yes — anonymous cash is used for these kinds of things, but you have to be physically present to transfer it.”

Gates is the latest famous figure to weigh in on the cryptocurrency craze, which has drawn polarizing reactions across the business and tech world. His friend billionaire Warren Buffet has also warned investors to steer clear from the digital currencies.

Others are more curious. Last month, Facebook CEO Mark Zuckerberg said he was interested in studying the “positive and negative” aspects of cryptocurrency technology. Meanwhile, Asian technology firms Line and Rakuten have unveiled plans to actively dive into the market.

In the same Reddit AMA, Gates revealed that he’s particularly excited about robotics and virtual assistant software.

“The most amazing thing will be when computers can read and understand the text like humans do,” he said. “Today computers can do simple things like search for specific words, but concepts like vacation or career or family are not ‘understood.’ Microsoft and others are working on this to create a helpful assistant.”

Gates was also asked if he’d ever run for U.S. president, to which he said no. The Microsoft co-founder said he can accomplish more as a private citizen through his foundation, which is focused on solving poverty and disease.

“I do think people are expecting too much from Government,” he added. “Yes Government can do better but local groups can do a lot that government can’t — helping out in schools, reaching out to people in poverty. This is also true internationally. I would like to see this civil society sector step up a lot more.”

This week, Gates kept up the tradition with a short cartoon of all the activities he wouldn’t be doing on the day of the question session, and asking Reddit a question of his own.

From 2013 to today, here’s how Bill Gates slayed them in the aisles on Reddit. Just don’t forget to tip your waiter.